<template>
  <div class="login-container">
    <div class="login-box">
      <!-- 头像区域 -->
      <div class="avatar-box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form :model="userForm" :rules="rules" ref="ruleForm" class="login-form" label-width="0px">
        <el-form-item prop="username">
          <el-input v-model="userForm.username"
                    placeholder="请输入用户名"
                    prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>

        <el-form-item prop="password">
          <el-input v-model="userForm.password"
                    placeholder="请输入密码"
                    type="password"
                    prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>

        <el-form-item class="btn-form">
          <el-button type="primary" @click="login">登录</el-button>
<!--          <el-button type="info" @click="cancel">重置</el-button>-->
        </el-form-item>

        <el-form-item class="btn-reg">
          <el-button type="text">没有账号？去注册</el-button>
        </el-form-item>

      </el-form>
    </div>
  </div>
</template>

<script>
  export default {
    // name: 'userLogin',
    data () {
      return {
        userForm: {
          username: 'admin',
          password: '123456'
        },
        rules: {
          username: [
            {
              required: true,
              message: '请输入用户名',
              trigger: 'blur'
            },
            {
              min: 3,
              max: 10,
              message: '长度在 3 到 10 个字符',
              trigger: 'blur'
            }
          ],
          password: [
            {
              required: true,
              message: '请输入密码',
              trigger: 'blur'
            },
            {
              min: 3,
              max: 10,
              message: '长度在 3 到 10 个字符',
              trigger: 'blur'
            }
          ]
        }
      }

    },
    methods: {
      cancel () {
        this.$refs.ruleForm.resetFields()
      },
      login () {
        this.$refs.ruleForm.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.axios.post('login', this.userForm)
          if (res.meta.status !== 200) return this.$message.error('登录失败')
          this.$message.success('登录成功')
          // 1.将登录成功后的 token，保存到客户端的 sessionStorage 中
          // 1.1 项目中除了登录之外的其他API接口，必须在登录之后才能访问
          // 1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage中
          window.sessionStorage.setItem('token', res.data.token)
          // 2.通过编程式导航转到后台主页，路由地址时 /home
          await this.$router.push('/home')
        })
      }
    }
  }
</script>

<style lang="less" scoped>

  .login-container {
    height: 100%;
    background-color: #cfd8e7;
  }

  .login-box {
    width: 450px;
    height: 350px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar-box {
      width: 130px;
      height: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 5px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;

      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }

  .login-form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 30px;
    box-sizing: border-box;
  }

  .btn-form {
    display: flex;
    justify-content: center;
  }

  .btn-reg {
    display: flex;
    justify-content: flex-end;
  }

</style>
